Makara Sankranti(Hindu)
Makar Sankranti (harvest festival also known by other various names) is the only Hindu festival which is based on the Solar calendar rather than the Lunar calendar. The festival is celebrated by taking dips in the Ganges river or any river and offering water to the Sun god. In Tamil Nadu this is popularly called Pongal, and special prayers and offerings are given the Sun to thank him for the harvest.